Consumer Price Index- CPI

The Current US Consumer Price Index - All Urban Consumers
(CPI-U) is compiled by the Bureau of Labor Statistics and
released monthly
and is based upon a 1982-1984 base of 100. An Index of 185 indicates
85% inflation since 1984 (actually the average of 1982-1984).
Since this is an index it only tells you the total inflation
since the base year. See the
Historical
CPI-U for the Consumer Price Index on a monthly basis
since
1913. An index of 9.8 in 1913 indicates that prices
multiplied over ten times from 1913 to 1982. It doubled
again from 1982 to 2006 when the index topped 200. By 2014
the Consumer Price Index topped 233.

In 2007 the Bureau of Labor Statistics began publishing
the index to three decimal places.

Our
Historical
Inflation Data is calculated to two decimal places while
the government only calculates to one decimal place. Our
data provides a "finer" view. The government may
say the rate for two consecutive months was 3.2% while our
data may show it as 3.15% and 3.24% respectively.